package thread;

public class Demo8 {
    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(() -> {
            for (int i = 0; i < 3; i++) {
                System.out.println("hello thread");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        });

        // 这个结果一定是 false.
        // 此时还没有调用 start, 没有真正创建线程.
        System.out.println(t.isAlive());

        t.start();

        while (true) {
            System.out.println(t.isAlive());
            Thread.sleep(1000);
        }
    }
}
